#version 330

out vec4 outputColor;

void main() {

	float grad = gl_FragCoord.y/500.0;

	outputColor = mix(vec4(1.0f, 1.0f, 1.0f, 1.0f),
				vec4(0.0f, 0.0f, 1.0f, 0.0f), grad);

}